SHGC

A metric of a glazing or window's ability to reduce solar heat gain. More specifically, the fraction of incident solar radiation admitted through a window. SHGC is expressed as a number between 0 and 1. The lower a window's SHGC, the less solar heat it transmits. Exterior temperature has a small influence on the result, and large angles of incidence will result in lower SHGCs than more normal angles.